Added log loading screen

src/main/kotlin/com/jetpackduba/gitnuro/ui/log/Log.kt

@@ -26,9 +26,7 @@ import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.drawscope.clipRect
 import androidx.compose.ui.graphics.vector.ImageVector
-import androidx.compose.ui.input.key.KeyEventType
 import androidx.compose.ui.input.key.onPreviewKeyEvent
-import androidx.compose.ui.input.key.type
 import androidx.compose.ui.input.pointer.PointerIcon
 import androidx.compose.ui.input.pointer.pointerHoverIcon
 import androidx.compose.ui.platform.LocalDensity
@@ -94,28 +92,56 @@ fun Log(
     selectedItem: SelectedItem,
     repositoryState: RepositoryState,
 ) {
-    val scope = rememberCoroutineScope()
     val logStatusState = logViewModel.logStatus.collectAsState()
     val logStatus = logStatusState.value
     val showLogDialog by logViewModel.logDialog.collectAsState()
 
+    when (logStatus) {
+        is LogStatus.Loaded -> LogLoaded(logViewModel, logStatus, showLogDialog, selectedItem, repositoryState)
+        LogStatus.Loading -> LogLoading()
+    }
+}
+
+@Composable
+private fun LogLoading() {
+    Column (
+        modifier = Modifier
+            .fillMaxSize()
+            .background(MaterialTheme.colors.background),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally,
+    ) {
+        CircularProgressIndicator()
+        Text(
+            text = "Loading commits history...",
+            style = MaterialTheme.typography.h4,
+            modifier = Modifier.padding(top = 8.dp),
+        )
+    }
+}
+
+@Composable
+private fun LogLoaded(
+    logViewModel: LogViewModel,
+    logStatus: LogStatus.Loaded,
+    showLogDialog: LogDialog,
+    selectedItem: SelectedItem,
+    repositoryState: RepositoryState
+) {
+    val scope = rememberCoroutineScope()
+    val hasUncommitedChanges = logStatus.hasUncommittedChanges
+    val commitList = logStatus.plotCommitList
+    val verticalScrollState by logViewModel.verticalListState.collectAsState()
+    val horizontalScrollState by logViewModel.horizontalListState.collectAsState()
+    val searchFilter = logViewModel.logSearchFilterResults.collectAsState()
+    val searchFilterValue = searchFilter.value
+
     val selectedCommit = if (selectedItem is SelectedItem.CommitBasedItem) {
         selectedItem.revCommit
     } else {
         null
     }
 
-    if (logStatus is LogStatus.Loaded) {
-        val hasUncommitedChanges = logStatus.hasUncommitedChanges
-        val commitList = logStatus.plotCommitList
-        val verticalScrollState by logViewModel.verticalListState.collectAsState()
-        val horizontalScrollState by logViewModel.horizontalListState.collectAsState()
-        val searchFilter = logViewModel.logSearchFilterResults.collectAsState()
-        val searchFilterValue = searchFilter.value
-        // With this method, whenever the scroll changes, the log is recomposed and the graph list is updated with
-        // the proper scroll position
-        verticalScrollState.observeScrollChanges()
-
     LaunchedEffect(verticalScrollState, commitList) {
         launch {
             logViewModel.focusCommit.collect { commit ->
@@ -277,7 +303,6 @@ fun Log(
         }
     }
 }
-}
 
 suspend fun scrollToCommit(
     verticalScrollState: LazyListState,